Edit a poster design

This is for a A4 ad in a magazine. I need professional edit for the quality and upgrade of the idea.

Brand website: www.24bottles.com to choose better color than I am using. In here I included water bottle with water benefits, can you make it 1 bottle 500 ml clima, and 1 travel tumbler 350 ml (check the website) in the same poster. right side water benefits, and left side for coffee benefits. The targer is students.